From 74b2dff9f55a7377d72338f02b628703d3532690 Mon Sep 17 00:00:00 2001
From: Bohdan Horbeshko <bodqhrohro@gmail.com>
Date: Tue, 22 Jul 2025 14:54:14 -0400
Subject: [PATCH] Properly yield a 403 error when banned from a supergroup

---
 xmpp/handlers.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/xmpp/handlers.go b/xmpp/handlers.go
index 647f0b1..9e00976 100644
--- a/xmpp/handlers.go
+++ b/xmpp/handlers.go
@@ -601,8 +601,9 @@ func handleMUCPresence(s xmpp.Sender, p stanza.Presence, mucExt stanza.MucPresen
 			}
 
 			status := session.GetMyStatusInChat(chatId)
-			// TODO: seems to be impossible for basic groups, check back when supergroups are supported
-			if status == telegram.ChatMemberStatusBanned {
+			log.Debugf("status in group %v: %v", chatId, status)
+			switch status {
+			case telegram.ChatMemberStatusBanned, telegram.ChatMemberStatusIllegal:
 				presenceReplySetError(reply, 403)
 				return
 			}
@@ -2093,6 +2094,9 @@ func presenceReplySetError(reply *stanza.Presence, code int) {
 	case 400:
 		reply.Error.Type = stanza.ErrorTypeModify
 		reply.Error.Reason = "jid-malformed"
+	case 403:
+		reply.Error.Type = stanza.ErrorTypeAuth
+		reply.Error.Reason = "forbidden"
 	case 404:
 		reply.Error.Type = stanza.ErrorTypeCancel
 		reply.Error.Reason = "item-not-found"